I think epta capitals are overtuned. Theoretically they're fragile, but in practice the bonus to flux dissipation from recent shield damage combined with the Aeolus's phase dive/the conquest's excellent point defenses means they're *better* at sticking around unsupported than other ships. I've been running a swarm of smodded Takeshido Conflictors with some LP Brawlers thrown in for coverage. In a recent fight against an Epta special battlegroup, I quickly lured off and took down their support ships, leaving them with nothing but three capitals, split across the battlespace. Naturally, I concentrated my 16-odd remaining frigates with 8 officers and Wolf Pack on an isolated Conquest (Plus a Heron for fighter support).... which proceeded to just not give a damn for a solid minute while the other two capitals moseyed over to join up with it. I'm not sure why this was the case- it might involve some of the difficulties in the Takeshido AI that I've noticed- but that was a solid 180 DP concentrated on a single capital, in a fleet with which I've had no trouble using to quickly eliminate vanilla conquests and onslaughts.
(The conflictors were loaded with a mix of Cyclone Reapers and Squalls, with all of them having Scala Autocannons in their small slots, so I don't think that an absence of kinetics is responsible here.)